Jefferson nickels are 5-cent coins first minted in 1938 to replace existing Buffalo nickels. They got their name after former American President Thomas Jefferson's bust on the coin obverse. The 1940 Jefferson nickel value depends on the mint mark, grade, and condition. Plus, some varieties and errors often significantly increase this coin type's price.  CoinValueLookup is a website that allows you to search for coin values and prices. It has a comprehensive database of U.S. and world coins that is updated regularly. You can lookup coin values based on the date, mint mark, condition, and grade of coins. The site also has useful information on coin collecting terminology, guides on grading coins, and tips on caring for your coin collection.  Pin: https://www.pinterest.com/coinvaluelookup/  FB: https://www.facebook.com/coinvaluelookup  TW: https://twitter.com/coinvaluelookup